It is reported that floods and serious l
题型:选择题
问题:
It is reported that floods and serious loss of soil and water have _______an ample amount of mud in the Yellow River, making pumping water out of it hard for farmers around.
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It is reported that floods and serious loss of soil and water have _______an ample amount of mud in the Yellow River, making pumping water out of it hard for farmers around.
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